I will pass on the Echo Loop because that thing looks ugly.
A Star Trek badge would be cool! According to Amazon's demo video, the Loop has to be held up to the user's ear in order to hear it. This is probably because the tiny battery inside can conserve energy by not having to amplify the tiny speaker inside. A badge cannot be held to a person's ear. So unless they can make advances in battery technology, a badge would be impractical. If they had both, I'd definitely pick the badge. But for now, I'm looking forward to the Echo Buds. I hope the pair aren't locked to each other so that I can use one with my Amazon acct and my GF can use the other.